The Popularity Score shows how popular a product is compared to other products in your catalogue.
The score ranges from 1 to 100, and is calculated by:
Cumulating all product interactions (per product).
Sorting all products based on product interaction from most interacted to least interacted.
Place sorted products in brackets, the size of (total # of products / 100)
Base the score on in which of the (100) brackets a product falls, with 100 being the highest.